I can hear the Train

I got home from work tonight, and when i got out of my car i chose to enjoy the usual silence as i sometimes do.
I find it relaxing, no matter what i'm thinking of, no matter what's bothering me, i step out into the morning silence and my head just clears out.
Todays normal silence was interrupted by the sound of the train running down the tracks about a mile away. It wasn't a disturbing noise, nothing was wrong with this, I just don't normally hear them.
It made me think about who is in charge of them, and how they work. What's their job like, i wonder.
Idk, maybe i'm just tired... like usual for 7 am.
Good night world, i'll see you this afternoon/